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LF147_NATIONAL

更新时间： 2025-04-20 23:46:07

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LF147_NATIONAL 数据手册

May 1999

LF147/LF347

Wide Bandwidth Quad JFET Input Operational Amplifiers

General Description

The LF147 is a low cost, high speed quad JFET input opera-

tional amplifier with an internally trimmed input offset voltage

Features

n Internally trimmed offset voltage: 5 mV max

n Low input bias current: 50 pA

n Low input noise current:

™

(BI-FET II technology). The device requires a low supply

current and yet maintains a large gain bandwidth product

and a fast slew rate. In addition, well matched high voltage

JFET input devices provide very low input bias and offset

currents. The LF147 is pin compatible with the standard

LM148. This feature allows designers to immediately up-

grade the overall performance of existing LF148 and LM124

designs.

n Wide gain bandwidth: 4 MHz

n High slew rate: 13 V/µs

n Low supply current: 7.2 mA

n High input impedance: 10¹²Ω

n Low total harmonic distortion A_V10,:

0.02%

R_L10k, V_O20 Vp-p, BW 20 Hz−20 kHz

n Low 1/f noise corner: 50 Hz

n Fast settling time to 0.01%: 2 µs

The LF147 may be used in applications such as high speed

integrators, fast D/A converters, sample-and-hold circuits

and many other circuits requiring low input offset voltage,

low input bias current, high input impedance, high slew rate

and wide bandwidth. The device has low noise and offset

voltage drift.

Simplified Schematic

Connection Diagram

⁄4

Quad

Dual-In-Line Package

DS005647-1

Note 1: Available per SMD #8102306, JM38510/11906.

DS005647-13

Top View

Order Number LF147J, LF347M, LF347BN,

LF347N or LF147J/883 (Note 1)

See NS Package Number J14A, M14A or N14A

™

BI-FET II is a trademark of National Semiconductor Corporation.

DS005647

www.national.com

12 3 4 5 6 7...13

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